Authors
Chris Phillips, Tasso Tzioumis, and Shaun Amy (CSIRO ATNF)
Abstract
VLBI (Very Long Baseline Interferometry) is a technique of astronomical interferometry combining the signal from radio telescopes separated by hundreds or thousands of kilometers to emulate a single, huge, telescope. VLBI can achieve spacial resolution much higher than all other astronomical instruments.
Traditionally, VLBI telescopes record data onto tapes or disks which are then shipped to a custom built data processor. Recent advances in networking means eVLBI is now possible. Recording is dispensed with and data streamed at rates of up to Gbps from each telescope to the data processor in realtime. The challenge for eVLBI is not just having having available wideband networks, but VLBI utilizes telescopes all around the world, usually in remote locations. At least 25 radio telescopes from around the globe have taken part in eVLBI.
I will discuss the progress made with eVLBI, both nationally and internationally as well as our plans for the future.